Ruby-like Question: Make this function shorter (ActionScript 3)

Question

I just wrote this incredibly verbose code to turn numbers like 2 into 02. Can you make this function shorter, please (maintaning the functionality)?

Answer 1

"If anybody wants to post some extremely short equivalent in some other language, that would be fun too."

In javascript it is easy - paste this into your browser's address bar

javascript: function zit(n, w) {var z="000000000000000000"; return (z+n).substr(-w);} alert(zit(567, 9)); void(0);